Koss UR18 Collapsible Home Headphones Silver Finish with 3.5mm Jack Compact and Lightweight Silicone Ear tips Inline Mute Switch Frequency response 25-15,000 Hz Dynamic Element for Extended Frequency Response Adjustable Headband for Best Fit Collapsible Design for Protective Storage and Maximum Portability Closed Leatherette Ear Cushion for Maximum Isolation and Deep Bass